Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5258072 | Additive composition for oil well cementing formulations | Sridhar Gopalkirshnan | 1993-11-02 |
| 4933378 | Fluid loss control additives for oil well cementing compositions | Clare H. Kucera, Stefano C. Crema, Gerd Konrad, Heinrich Hartman | 1990-06-12 |
| 4931489 | Fluid loss control additives for oil well cementing compositions | Clare H. Kucera, Stefano C. Crema, Gerd Konrad, Heinrich Hartmann | 1990-06-05 |